Remove unused logger from class

The logger is not used in this class.  Might as well remove it.

json-path/src/main/java/com/jayway/jsonpath/spi/json/AbstractJsonProvider.java

@@ -15,8 +15,6 @@
 package com.jayway.jsonpath.spi.json;
 
 import com.jayway.jsonpath.JsonPathException;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import java.util.Collection;
 import java.util.List;
@@ -24,9 +22,6 @@ import java.util.Map;
 
 public abstract class AbstractJsonProvider implements JsonProvider {
 
-    private static final Logger logger = LoggerFactory.getLogger(AbstractJsonProvider.class);
-
-
     /**
      * checks if object is an array
      *